package javaIO;

import java.io.*;
import java.util.Random;

class Data implements Serializable{
    private int n;
    public Data(int n) {this.n = n;}

    @Override
    public String toString() {
        return Integer.toString(n);
    }
}
public class Worm implements Serializable{
    private static Random rand = new Random(47);
    private Data[] d = {
            new Data(rand.nextInt(10)),
            new Data(rand.nextInt(10)),
            new Data(rand.nextInt(10))
    };
    private Worm next;
    private char c;
    public Worm(int i,char c){
        System.out.println("Worm constructor: "+i);
        this.c = c;
        if (--i > 0){
            next = new Worm(i,(char)(c + 1));
        }
    }
    public Worm(){
        System.out.println("Default constructor");
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder(":");
        sb.append(c);
        sb.append("(");
        for (Data data : d){
            sb.append(data);
        }
        sb.append(")");
        if (next != null){
            sb.append(next);
        }
        return sb.toString();
    }

    public static void main(String[] args) throws ClassNotFoundException,IOException {
        Worm w = new Worm(6,'a');
        System.out.println("w = "+w);
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("worm.out"));
        out.writeObject("Worm storage\n");
        out.writeObject(w);
        out.close();

        ObjectInputStream in = new ObjectInputStream(new FileInputStream("worm.out"));
        String s = (String)in.readObject();
        Worm w2 = (Worm)in.readObject();
        System.out.println(s + "w2 = "+w2);

        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        ObjectOutputStream out2 = new ObjectOutputStream(bout);
        out2.writeObject("Worm storage\n");
        out2.writeObject(w);
        out2.flush();

        ObjectInputStream in2 = new ObjectInputStream(new ByteArrayInputStream(bout.toByteArray()));
        s = (String) in2.readObject();
        Worm w3 = (Worm)in2.readObject();
        System.out.println(s + "w3 = "+w3);
    }
}
